[kanbankaren]

The standard 60Hz refresh rate of monitors is unlikely to produce any eyestrain. The refresh rate of the backlight could produce eyestrain and headaches.

Unfortunately, the exact frequency of the PWM used for backlight isn't often mentioned in the specs.

In general, anything above 500 Hz is better as some people get headaches even for 250 Hz.

[JoshuaEN]

Rtings.com measures PWM frequency[1] as part of their reviews.

1. https://www.rtings.com/monitor/tests/motion/image-flicker

[kanbankaren]

P. S. The linked website is poor on details and not worth reading.